#pragma once

#ifndef TPLUGINMANAGER_INCLUDED
#define TPLUGINMANAGER_INCLUDED

//
// TPluginManager
//
// usage example. Main program:
//
//    TPluginManager::instance()->setIgnored("tnzimage");
//    TPluginManager::instance()->loadStandardPlugins();
//
// N.B. "tnzimagevector" is ignored by default
//
// Plugin :
//
//    TPluginInfo info("pluginName");
//    TLIBMAIN
//    {
//       ....
//       return &info;
//    }
//

//#include "tfilepath.h"
#include "tcommon.h"
#include <set>

#undef DVAPI
#undef DVVAR
#ifdef TSYSTEM_EXPORTS
#define DVAPI DV_EXPORT_API
#define DVVAR DV_EXPORT_VAR
#else
#define DVAPI DV_IMPORT_API
#define DVVAR DV_IMPORT_VAR
#endif

class TFilePath;

//-----------------------------------------------------------------------------

class DVAPI TPluginInfo
{
	std::string m_name;

public:
	TPluginInfo(std::string name = "") : m_name(name){};
	~TPluginInfo(){};
	std::string getName() const { return m_name; };
};

//-----------------------------------------------------------------------------
//
// L'entry point del plugin e' TLIBMAIN {....}
//
#ifdef _WIN32
#define TLIBMAIN                     \
	extern "C" __declspec(dllexport) \
		const TPluginInfo *          \
		TLibMain()
#else
#define TLIBMAIN \
	extern "C" const TPluginInfo *TLibMain()
#endif

//-----------------------------------------------------------------------------

class DVAPI TPluginManager
{ // singleton

	class Plugin;

	std::set<std::string> m_ignoreList;
	typedef std::vector<const Plugin *> PluginTable;
	PluginTable m_pluginTable;
	std::set<TFilePath> m_loadedPlugins;

	TPluginManager();

public:
	~TPluginManager();
	static TPluginManager *instance();

	// the name should be ignored? (name only; case insensitive. e.g. "tnzimage")
	bool isIgnored(std::string name) const;

	// set names to ignore; clear previous list
	void setIgnoredList(const std::set<std::string> &lst);

	// helper method.
	void setIgnored(std::string name)
	{
		std::set<std::string> lst;
		lst.insert(name);
		setIgnoredList(lst);
	}

	// try to load plugin specified by fp; check if already loaded
	void loadPlugin(const TFilePath &fp);

	// load all plugins in dir
	void loadPlugins(const TFilePath &dir);

	// load all plugins in <bin>/plugins/io and <bin>/plugins/fx
	void loadStandardPlugins();

	// unload plugins (automatically called atexit)
	void unloadPlugins();
};

#endif